Note that in [1]} it is shown that for \(\frac{2}{3}<p<2,\)  \(q=\frac{p}{2}\) , \(\alpha >0\)  and \(a=1\)  a trajectory of the dynamical system (REF ) satisfies the following:
\(g(x(t))-\min g= \mathcal {O} \left( \frac{1}{t^{\frac{3p}{2}-1}} \right)\)  and \(\liminf _{t \rightarrow \infty }{\Vert  x(t) - x^\ast \Vert } = 0.\)
